Machine-planer head



J. BOPP. MACHINE PLANERHEAD.

(NoModeL) Patented Sept. 30, 1890. 7

nvmvrok WITNESS 97% flwd 5M 8w, ATTOR/VEK Fig. 1.

UNITED STATES PATENT OFFICE.

JOHN- orn or BROOKLYN, NEW YORK.

MACHlNE-PLANER HEAD.

SIECIFICATION forming part of Letters Patent No. 437,329, datedSeptember 30, 1890.

Application filed April 28, 1890. Serial No. 349,779- (No model.)

.To all whom it may concern:

Be it known that 1, JOHN BOPP, a citizen of the United States, and aresident of Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Machine-Planer Heads, ofwhich the following is a specification.

My invention relates to improvements in cutter-heads formachine-planers; and it is an improvement upon the invention patented tome as assignee of myself and John McOort by United States LettersPatent, dated February 4, 1890, and numbered 420,569.

In the drawings hereof the same referenceletters indicate the same partsin all the figures.

Figure 1 illustrates an end view of the cutter-head, all but one cornerthereof being broken away, and shows the method of attaching the cutterto the head and the pecu liar construction of the head. Fig. 2illustrates a side elevation of the parts shown in Fig. 3 illustrates anend sectional view of an alternative construction of the cutter-head,the section being taken between two adjoining separate knives.

7 present invention.

I refer to the said patent for a general description of the cutter-head,the arrangement of the parts, and the operation of the same, and shallconfine the description and illustrations of this present application tothose parts only which specifically relate to the In the said formerpatent the forward ends of the knives were confined by a shouldered boltlocated beyond the edge of the head, which bolt was held to the head ona side at right angles to the side upon which the knife which it heldrested. I have discovered that the knives can be supported aseffectively for some purposes by throwing out brackets beyond thecorners of the head, which shall not be broader than the width of theknives supported upon them,

stantially the distance between the axis of the head and the sidethereof midway between two corners, then the result will be the same aswhen the brackets are used, and the size of the head as a whole may bereduced. I show both of these alternative forms in the drawings hereof.

Referring first to Figs. 1 and 2, A is the cutter-head. B are thebrackets thrown out therefrom at its corners. They may be integral withthe head or separate and fastened to it. C are the knives. D are themenforce plates. They are not essential, but I prefer to use them. E arethe rear bolts, which may be screwed into a straight hole tapped intothe head, as shown in Fig. 3 at F, or they may have enlarged heads G,which work in a longitudinal undercut or dovetail groove H out in thehead, as in the other patent, and I are the bolts, which hold the frontend of the knives. They may also have enlarged heads J, which fit andengage in a dovetail groove K cut longitudinally through the brackets,as shown in Figs. 1 and 2, or

they. may be screwed into threaded holes made in the brackets or theirequivalent, as shown in Fig. 8. If the dovetail grooves are used, theknives may be more quickly and easily adjusted, and may also be shiftedsomewhat along the head.

In Fig. 3 I illustrate the alternative construction above referred to,in which the metal of thehead is cut away between the knives on an are Lof a circle struck from the axis of the head, leaving only the partsMbethe head, and in the other instance the circle will be defined by aradius from the axis to the middle of the side of the head between thecorners, and in both cases the knives are supported upon brackets whichproject radially beyond the said circle.

I do not limit myself to the details of construction shown, since theymay be somewhat departed from and still the gistof my invention beemployed.

I claimthe knives rest, the metal between'the brackets being removed,and a dovetailed groove running through the brackets, substantially 1. Acutter-head for planers, having brackas set forth. r 5 5 et-like partsintegral with the head,whieh are Signed at Brooklyn, in the county ofKings not wider than the knives and. upon which and State of New York,this 26th day of April, the knives rest, the metal between the brack- A.D. 1890.

ets being removed, substantially as set forth. I JOHN BOPP.

2. A cutter-head for planers, having braek- Witnesses: 1o et-like partsintegral with the head,which are PHILLIPS ABBOTT,

not wider than the knives and upon which FREDERICK SMITH.

